NFPA 231C-1998 Standard for Rack Storage of Materials

NFPA 231C-1998 Standard for Rack Storage of Materials. Face Sprinkler. A standard sprinkler that is located in a transverse flue space along the aisle or in the rack, within 18 in. (0.46 m) of the aisle face of storage, and that is used to oppose the vertical development of fire on the external face of storage. Free-Flowing Plastic Material. Plastic that falls out of its container during a fire, fills flue spaces, and creates a smoth- ering effect on the fire. Some examples include powder, pel- lets, flakes, or random-packed small objects [e.g., razor blade ] dispensers, 1-oz to 2-oz (29.6-ml to 59.1-ml) bottles]. Horizontal Barrier. A solid barrier in the horizontal posi- tion that covers the entire rack, including all flue spaces at cer- tain height increments, to prevent vertical fire spread. Labeled. Equipment or materials to which has been attached a label, symbol, or other identifying mark of an orga- nization that is acceptable to the authority having jurisdiction and concerned with product evaluation, that maintains peri- odic inspection of production of labeled equipment or mate- rials, and by whose labeling the manufacturer indicates compliance with appropriate standards or performance in a specified manner. Listed.* Equipment~ materials, or services included in a list published by an organization that is acceptable to the author- ity having jurisdiction and concerned with evaluation of prod- ucts or services, that maintains periodic inspection of production of listed equipment or materials or periodic eval- uation of services and whose listing states that either the equipment, material, or service meets ~denufied standards or has been tested and found suitable for a specified purpose. Rack. Any combination of vertical, horizontal, and diago- nal members that supports stored materials. Some rack struc- tures use solid shelves. Racks shall be permitted to be fixed, portable, or movable [see Fig~res A-4-1(a) through (k)]. Loading shall be permitted to be either manual — using lift trucks, stacker cranes, or hand placement — or automatic — using machine-controlled storage and retrieval systems. Double-Row Rack. Two single-row racks placed back-to-back that have a combined width of up to 12 ft (3.7 m), with aisles of at least 3.5 ft (1.1 m) on each side. Movable Rack. A rack on fixed rails or guides that can be moved back and forth only in a horizontal, two-dimensional plane. A moving aisle is created as abutting racks are either loaded or unloaded, then moved...